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Here it is, what everyone anticipated was right on the heels of the Weistec M156 superchargers, the Weistec Mercedes SLS AMG 750 Supercharger Kit. This supercharger is the same 2.3 liter twin screw unit used on the M156 motors however the setup on the SLS is much stronger. 638 wheel horsepower for a Weistec M159 SLS 750 supercharger vs. 538 for a Weistec Stage I+ M156 supercharger. A 100 wheel horsepower difference is nothing to sneeze at and anything over 600 wheel is simply incredibly powerful.

The changes the M159 sees versus the M156 account for the majority of the difference between the two. No doubt people will also notice the difference in price between the M156 and M159 supercharger setups and that is to be expected with different tuning, a smaller market, and necessary hardware changes to accommodate the SLS. 638 wheel horsepower, a curb weight in the 3600 range (lighter than any factory Mercedes with the M156), and a dual clutch transmission make for one of the strongest performance platforms in the Mercedes world today. Oh, and yes, CARB approved.

So they must've changed their style on their end then because it is definitely different. They must've read some of the comments and acted upon them. I really hope they weren't reading the rest of the gibberish we created in their other thread, as I feel bad that the whole thread was ruined in the midst of all the different arguments back and forth. I think 99% of the posts were not even about them.

Maybe, I can't comment for them all I am saying is I did the exact same thing.

Originally Posted by Exeenom

And that was exactly my opinion from the other thread: list a small summary on the graph but always provide a list of details in a nice organized structure outside the graph

I believe both were done both times and both the graph and the features list contain important information with what they are associated. The main thing is to have as much information as possible and what works well for one reader may not work well for all readers. Regardless, glad you like the way this was listed.

It's an interesting question and for now all that can be said is this is the complete SLS offering. You will notice there is no Stage I nomenclature in the post, only SLS 750.

The addition of a nice set of long tube headers and an aggressive race tune would probably put this baby around 800 hp if not more. I'm really hoping that one of the supercharger customers will eventually crave more power and push Weistec for the next phase

I believe both were done both times and both the graph and the features list contain important information with what they are associated. The main thing is to have as much information as possible and what works well for one reader may not work well for all readers. Regardless, glad you like the way this was listed.

No last time there was no mention of the aftermarket filters and/or charcoals anywhere except on the dynograph image. There was no Package details list like we have here. Either way, it's all good.... it was just some suggestions and it looks like they actually took them into consideration. This is usually a good indication that the company has a solid customer service foundation. They are honestly doing great things for the M156/M159 platform. I, for one, am glad they haven't abandoned the platform for the new TT engine and that they continue to push forward

Are the M159 headers significantly different from the M156 from the factory?

Yep.... the M156 stock headers is nothing but a very bad exhaust manifold. The stock M159 headers are supposed to be very close to equal length tubular headers that are between shorties and mid-length. However, most companies that make headers for the SLS were still able to find a lot more power in going with full long-tubes setup. I am thinking another 30 to 40 whp from headers + tune is a good conservative average for gains on NA setup. Not sure how this will translate on the supercharged setup yet though.

No last time there was no mention of the aftermarket filters and/or charcoals anywhere except on the dynograph image

There is no mention of the octane or that the baseline is fully stock anywhere except for in the dyno graph. Likely because that information is only pertinent to the graph and not the features of the kit.

Originally Posted by Exeenom

This is usually a good indication that the company has a solid customer service foundation.

Trust me, they are one of the most professional outfits I have ever dealt with.

Originally Posted by Exeenom

I, for one, am glad they haven't abandoned the platform for the new TT engine and that they continue to push forward

I am glad as well and think they are building up a great foundation for the future.

There is no mention of the octane or that the baseline is fully stock anywhere except for in the dyno graph. Likely because that information is only pertinent to the graph and not the features of the kit.

I wasn't talking about the octane. I was simply saying there was no mention of what the package includes. For example, the +47 whp gain was achieved from a tune + aftermarket filters, right? Does that mean the package includes aftermarket filters or are those sold separately as an option. If they are included in the package, then what kind were they? Were the charcoals removed? Etc...

The addition of a nice set of long tube headers and an aggressive race tune would probably put this baby around 800 hp if not more. I'm really hoping that one of the supercharger customers will eventually crave more power and push Weistec for the next phase

I'd bet you're right... but, the 50-state emissions legality would go out the window... so it'd depend on the customer, to be certain.

Plus, people have already complained that the SLS (even stock) is tail-happy and oversteer-prone - this kit (or a future race-only upgrade) probably isn't helping things in that dept.

I wasn't talking about the octane. I was simply saying there was no mention of what the package includes. For example, the +47 whp gain was achieved from a tune + aftermarket filters, right? Does that mean the package includes aftermarket filters or are those sold separately as an option. If they are included in the package, then what kind were they? Were the charcoals removed? Etc...

You guys are seriously going to argue about this again? Didn't get it out of your systems last time?

You guys are seriously going to argue about this again? Didn't get it out of your systems last time?

Nope.... no arguing. I definitely don't want to derail this thread like we did with the other one. It was a freakin mess last time. Weistec deserves that we focus on their product a little more this time; they are doing great.

I wasn't talking about the octane. I was simply saying there was no mention of what the package includes. For example, the +47 whp gain was achieved from a tune + aftermarket filters, right? Does that mean the package includes aftermarket filters or are those sold separately as an option. If they are included in the package, then what kind were they? Were the charcoals removed? Etc...

Well the NA tune isn't only for 91 octane users and it doesn't include filters to my knowledge, it is just the tune you are buying not fuel/filters. The graph included showed on a dyno what the result looks like with the tune on a certain octane and without filters. Filters aren't a feature of the tune just like the baseline shown here with its octane rating isn't a feature of the supercharger and should logically be included on the dyno graph. That is how I see it, separate entities that are part of a picture.

Regardless, they have always done a good job IMO listing features of the product they are selling in press releases.

I have no idea what filters they were, that is a question you would have to ask Weistec.

Well the NA tune isn't only for 91 octane users and it doesn't include filters to my knowledge, it is just the tune you are buying not fuel/filters. The graph included showed on a dyno what the result looks like with the tune on a certain octane and without filters.

Actually the graph showed what the "result looks like with the tune and aftermarket filters". The +47 whp gains shown were due to tune + drop-in filters, right? If the filters are not included and the customer just has stock filters, then gains will be lower. And if that was the case, I think they should've provided gains from only a tune then maybe gains from a tune + filters, etc.... this way they are not including gains from something that is not part of what they're selling in the package.... but this is just my opinion of course. I've seen other companies provide dyno with tune-only, tune + filters, tune + filters + charcoals delete, etc....

Are the M159 headers significantly different from the M156 from the factory?

The heads on the m159 are very different. I am currently having trouble trying to source the valve train and assembly from the 159. I can get part numbers but mb won't sell the parts to me. This is all to try and make the sls cams work with the 156 motor, hence why just fitting the cams have never worked.

The heads on the m159 are very different. I am currently having trouble trying to source the valve train and assembly from the 159. I can get part numbers but mb won't sell the parts to me. This is all to try and make the sls cams work with the 156 motor, hence why just fitting the cams have never worked.

Ideally one would want the heads and cams.

Does Schrick not have M156 cams?

It is also likely the aftermarket can do better than the M159 heads although clearly they are very good from the factory.